import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int s = sc.nextInt();
        int t = sc.nextInt();
        String c = sc.next();
        System.out.println(
                (c.equals("<") && s < t) || (c.equals("=") && s == t) || (c.equals(">") && s > t) ? "YES" : "NO");
    }
}